Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id ; Sat, 16 Nov 2002 08:17:59 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id ; Sat, 16 Nov 2002 08:17:59 -0500 Received: from elin.scali.no ([62.70.89.10]:44814 "EHLO elin.scali.no") by vger.kernel.org with ESMTP id ; Sat, 16 Nov 2002 08:17:59 -0500 Date: Sat, 16 Nov 2002 14:26:32 +0100 (CET) From: Steffen Persvold X-X-Sender: sp@sp-laptop.isdn.scali.no To: linux-kernel@vger.kernel.org Subject: Xeon with HyperThreading and linux-2.4.20-rc2 In-Reply-To: <3DD536FB.70309@colorfullife.com> Message-ID: MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1232 Lines: 30 Hi all, I've two boxes with Dual Xeons 1.8 GHz and HT option enabled in BIOS. When I boot 2.4.20-rc2 with default arguments the kernel detects 4 processors and also reports 4 processors in /proc/cpuinfo wiht the "ht" feature. However, if I boot with the "noht" option (wich I believed turned off HT and therefore only two processors should be available), the kernel still detects 4 processors, _but_ now the "ht" feature in /proc/cpuinfo is not there. Is this the intention of the "noht" option ? If so, are there any options available to turn off HT support in the kernel completely, so that I don't have to go into the BIOS to turn it off ? If you want to I can provide the dmesg output and .config. I think this issue is not just related to 2.4.20-rc2, but earlier kernels aswell. Regards, -- Steffen Persvold | Scali AS mailto:sp@scali.com | http://www.scali.com Tel: (+47) 2262 8950 | Olaf Helsets vei 6 Fax: (+47) 2262 8951 | N0621 Oslo, NORWAY - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/